linux-kernel - Re: [PATCH] media: Kconfig: Make DVB_CORE=m possible when MEDIA

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Date:   Wed, 3 Nov 2021 16:05:01 +0800
From:   Lecopzer Chen <lecopzer.chen@...iatek.com>
To:     <hverkuil@...all.nl>
CC:     <lecopzer.chen@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <linux-media@...r.kernel.org>, <mchehab@...nel.org>,
        <yj.chiang@...iatek.com>
Subject: Re: [PATCH] media: Kconfig: Make DVB_CORE=m possible when MEDIA_SUPPORT=y

> On 05/10/2021 12:51, Lecopzer Chen wrote:
> > A case that we need VIDEO_DEV=y but DVB_CORE=m, and this doesn't
> > work since DVB_CORE is default MEDIA_DIGITAL_TV_SUPPORT and then
> > follows MEDIA_SUPPORT.
> > 
> > Change to tristate to make DVB_CORE=m possible when MEDIA_SUPPORT=y
> > 
> > Signed-off-by: Lecopzer Chen <lecopzer.chen@...iatek.com>
> > ---
> >  drivers/media/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig
> > index b07812657cee..c3baf92b4d02 100644
> > --- a/drivers/media/Kconfig
> > +++ b/drivers/media/Kconfig
> > @@ -88,7 +88,7 @@ config MEDIA_ANALOG_TV_SUPPORT
> >  		will disable support for them.
> >  
> >  config MEDIA_DIGITAL_TV_SUPPORT
> > -	bool
> > +	tristate
> >  	prompt "Digital TV" if MEDIA_SUPPORT_FILTER
> >  	default y if !MEDIA_SUPPORT_FILTER
> >  	help
> > 
> 
> I don't think this is the right approach.
> 
> I think the following patch would fix the issue, and it is also in line
> with what config VIDEO_DEV does.
> 
> What do you think, Mauro?
> 
> Regards,
> 
> 	Hans
> 
> Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
> ---
> diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig
> index c3baf92b4d02..46f7b1f75630 100644
> --- a/drivers/media/Kconfig
> +++ b/drivers/media/Kconfig
> @@ -179,8 +179,7 @@ config MEDIA_CONTROLLER
>  #
> 
>  config DVB_CORE
> -	tristate
> -	depends on MEDIA_DIGITAL_TV_SUPPORT
> +	tristate "DVB core"
>  	depends on (I2C || I2C=n)
>  	default MEDIA_DIGITAL_TV_SUPPORT
>  	select CRC32

Hi Hans

Thanks for the patch, both patches work in my test.
But I think your is more intuitive, I've pushed v2 with this patch
with your sign-off-by for the further discussion and reviewing.

Thanks
Lecopzer